Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding today. Gusty winds and low relative humidity will bring critical fire weather conditions to parts of the Great Basin and northern Rockies today and Thursday. Hot to extremely hot temperatures are in place through today across parts of the western U.S. Read More >
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Overview
Radar
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6-hour radar loop (4 PM - 10 PM). Storms after 10 PM were sub-severe. |
Environment
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| Convective Available Potential Energy (CAPE), or a measure of "fuel" for thunderstorms at 5 PM. Values above 4,000 J/kg are supportive of explosive thunderstorm development. | Wind shear, or change of wind direction and speed from the surface to about 20,000 feet. Values are generally below 30 knots which is not particularly supportive of supercell (rotating) storms. | Microburst composite parameter, which highlights regions favorable for intense microbursts/downbursts. Values were exceptionally high over northern and central Illinois. |
Additional Information
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Media use of NWS Web News Stories is encouraged! Please acknowledge the NWS as the source of any news information accessed from this site. Additional recaps can be found on the NWS Chicago Past Events Page |
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